Multiplication control mechanism



Filed Jan. 10, 1951 F. W. PFLEGER MULTIPLI FOR ION CONTROL MECHANISM CULATING MACHINES 8 Sheets-Sheet 1 W g\ 2* L +'Q .51 EP 000000000 5 n E0 0000000000 -12 M 0000000000 1:- 1:16 0000090000 9 l u 90 0000000000 :1 m0 0000000000 m I30 0000000000 El 130 0000000000 u 0 0000000000 u w @0000 000 I] L E] J k d u m D .5 I L Enventor FREDERICK W PFLEGER Clttorneg F. W. PFL EGER HULTIPLICATION CONTROL MECHANISM July 14, 1953 FOR CALCULATING MACHINES lFi led Jan. 10, 1951 8 sheets sheet 2 l l l l I llllll Zhmentor FREDERICK w PFLEGER Gnorneg July 14, 1953 F. w. PFLEGER 2,645,

' MULTIPLICATION CONTROL MECHANISM FOR CALCULATING MACHINES Filed Jan. 10, 1951 8 Sheets-Sheet I5 Imventor FREDERICK W PFLEGER Gttorneg 3 2 m 2 w I 1 ms cm um ELM G Ema .L Fmn P A m 0 wn .Am FEC m July 14, '1953 8 Sheets-Sheet 4 Filed Jan. 10, 1951 n a o (I Zhwentor FREDERICK H PFLEGER (Ittomeg July 14, 1953' F. w. PFLEGER I MULTIPLICATION CONTROL MECHANISM FOR CALCULATING MACHINES v 8 Sheets-Sheet 5 Filed Jan. 10, 1951 FREDERICK W PFLEGER Gttomeg I July 14, 1953 F w PFLEGER 2,645,423

MuL'rIPLICATIdN CONTROL MECHANISM FOR CALCULATING MACHINES Filed Jan. 10, 1951 8 Sheets-Sheet 6 Zmventor FREDERICK W PFLEGER I Z (Ittomeg July 14, 1953 F. w. PFLEGER MULTIPLICATION CONTROL MECHANISM FOR CALCULATING MACHINES 8 Sheets-Sheet 7 Filed Jan. 10, 1951 /00 Zhwentor FREDERICK W. PFLEGER' July 14,1953. F. w. PFLEGER MULTIPLICATION CONTROL MECHANISM FOR CALCULATING MACHINES v 8 Sheets-Sheet 8 Filed Jan. 10, 1951 ZSnoentor FREOER/CK W PFLEGER attorney Patented July 14, 1953 MULTIPLICATION CONTROL MECHANISM FOR CALCULATING MACHINES Frederick W. Pfleger, West Orange, N. J assignor to Monroe Calculating Machine Company, Orange, N. J., a corporation of Delaware Application January 10, 1951, Serial No. 205,304

13 Claims. 1

The invention relates to multiplication control means for calculating machines, and more particularly to improvements in control means such as disclosed in the co-pending application 160,154,

'of Herman Gang, filed May 15, 1950, which is of the same general character as disclosed in the copending application 711,253 of Edwin F. Britten, Jr., filed November 21, 1945.

According to the aforenoted disclosures, the multiplication control means comprises a multiplier storage magazine having a series of elements successively settable to represent the successive digits, including zero values, of the multiplier. Each setting operation is followed by an indexing operation of the magazine, thereby moving the storage elements into position for the next setting operation; and the successively set storage elements are utilized in like sequence to control the duration of registration and carriage shift. The

multiplying operation is initiated as an incident to the first indexing operation and the following setting and indexing operations may be performed concurrently with th registering and/or carriage shifting operations.

According to the disclosure of application 160,154, reciprocally operable driving connections first set one of a series of digit slides, or alternatively one of an equal number of zero slides, and then index the storage magazine to position the next of the series of digit and zero slides into setting position. The improved storage devices of the present invention distinguish from the structure of said application 160,154 by the utilization of a single series of slides each of which is differentially settabl to digit representing positions or alternatively to a zero representing position in lieu of the separate sets of slides for digit and zero multipliers respectively. It will be understood that the term digit as hereinafter applied excludes the zero and refers only to one to nine. Obviously, the improved arrangement permits a doubling of the number of slides which may b mounted in a given size magazine thereby providing for a greater storage capacity of the magazine if desired. Alternatively, the magazine may be made smaller for a given multiplier capacity, thereby decreasing the inertia of the parts and providing more space for related mechanism. Furthermore, it has been found that the improved arrangement permits a further reduction in the number of parts and a simplification of their operation.

As in said application 160,154, the setting and indexing connections of the invention are op- ,erated by an auxiliary clutch which isengaged for a single cycle of operation upon depression of any one of a series of multiplier keys 0 to 9. The keys are depressed in accordance with the successive values of the multiplier digits and the first indexing operation is effective to initiate the multiplying operation, thereby permitting the subsequent setting and indexing operations to be effected concurrently with the calculation. A depressed multiplier key is efiective to latch the other multiplier keys against depression and the depressed key is latched against retraction until the completion of th current setting and indexing operations. The operations however, of the setting and indexing clutch is so rapid that the sequential depression of the succeeding multiplier keys may be effected as rapidly as is normally possible by the operator.

In the accompanying drawings illustratin the invention:

Fig. 1 is a plan view of a calculating machine embodying the invention;

Fig. 2 is a left side elevation of the machine showing the registration control means, the stopping means therefor, and the setting and indexing clutch;

Fig. 2a is a detail elevation of certain parts shown in Fig. 2;

Fig. 3 is 'a vertical section through the machine showing the registering mechanism and the multiplier storage magazine;

Fig. 4 is a-perspective View of the multiplier storage magazine and the controls therefor;

Fig. 5 is a detailed fragmentary perspective of parts shown in Fig. 4 and control mechanisms related therewith;

Fig. 6 is a plan view ofthe selection mechanism for the multiplier storage magazine;

Fig. 7 is a longitudinal section through the multiplier storage magazine;

Fig. 8 is a view taken on line 88 of Fig. 7 looking in the direction of the arrows;

Fig. 8a is a view similar to Fig. 8 with'the parts in another position;

Fig. 9 is a View taken on line 99 of Fig. '7 with the parts in the position corresponding to the position of the parts shown in Fig. 8;

Fig. 9a is a view similar to Fig. 9 with the parts in the position corresponding to the position of REGISTERING OPERATION The product dividend register comprising the numeral wheels 1 (Figs. 1 and 2) is mounted in the denominationally shiftable carriage 2. Registration is effected on wheels l by cyclically operable actuating mechanism comprising the differentially settable actuators 3 and the tens transfer actuators (Figs. 2 and 3) which are mounted in the base of the machine. The difierential actuators 3 are set by selector bails 5 in accordance with depressed settable numeral keys (5 of the keyboard, thereby determining the value registered in wheels I upon each cycle of operation of the actuating mechanism.

The differential actuators 3 and tens transfer actuators 4 are driven at a one to one ratio by a gear train 7 from the output gear 8 of the differential clutch mechanism 9 (Fig. 2). The differential clutch mechanism is constructed and transmits power from the motor 10 (Fig. 3) substantially in accordance with the disclosure of U. S. Patent No. 1,566,560, issued to George C. Chase on December 22, 1925. Normally the gearing comprising both working legs of the differential drive rotate idly as described in the aforenoted patent and no movement is transmitted to output gear 8. However, interruption of the movement of one of the legs will cause the planet gears to move in their orbit in one direction accordingly rotating output gear 8 and interruption of the movement of the other leg will cause movement in the other rotation of output gear 8.

l'he working legs of the differential drive are selectively arrested by means of a reversing clutch lever ll (Figs. 2 and 2a) which is fulcrumed on the machine frame and setta-ble to neutral, additive and subtractive positions. Clockwise movement of lever l i will position it to additive setting whereby a hook arm 12 of said lever will engage a lug i3 on gear i l forming one leg of the differential drive to interrupt its movement, thereby causing rotation of the output gear 8. Conversely, counterclockwise movement will position the lever ll to subtractive setting whereby a hook arm i5 thereof will engage a stop i6 for the other leg of the difierential to interrupt its movement and cause rotation of output gear 8 in the reverse direction. As hereinafter described, the multiplication control mechanism is selectively operable to move clutch lever ii to one or the other of its active positions to initiate the registering operations of the calculation and is operable to initiate the operation of stopping means (to be described) for moving the clutch lever H to neutral position to conclude each of the successive registering operations. Also, depression of the plus and minus bars ii and 18 (Fig. 1) are adapted to move clutch lever H to its additive and subtractive settings respectively and upon release the bars are effective to initiate operation of the stopping means. The controls, however, for these operations which are eifected upon manipulation of the plus and minus bars are not shown as they form no part of the present disclosure nor do they have any operating relation therewith.

During each registering cycle of the actuators 3 and 1, a counting finger (not shown) will register a. count in one of the numeral wheels i9 of the multiplier-quotient register (Fig. 1). This operation is an incident to the registration of the product in the product register under the control of the devices of the invention and the counting finger and the operating mechanism therefore may be of any well known design, such as that shown in U. S. Patent No. 2,273,237, 1ssued to Edward C. Walter on February 17, 1942.

direction and reverse FULL CYCLE STOPPING MEANS A rock arm 22 (Figs. 2 and 2a) is fixed at its lower end exteriorly of the left side frame, on shaft 23. Shaft 23 extends across the machine and is journaled in the machine framing for rocking movement with arm 22. Arm 22 has link connection 29 with a crank 2i fixed on a shaft 25 which is driven by the actuator drive train 7 (Figs. 2 and 3) at a one to one ratio with actuators 3 and 4. Therefore, arm 22 will be rocked, from the full cycle position shown in Figs. 2 and 2a, forwardly and return during each operating cycle of the registering mechanism.

A stop arm 24 (Figs. 2 and 2a) is pivotally mounted on shaft 23 adjacent and. inwardly of rock arm 22 and is normally biased toward the rear of the machine into engagement with a fixed pin 33 by a spring 24. Mounted at the upper end of arm 24 is a spring urged pawl 2? which is held in inactive position by a trigger 28. Means hereinafter described in connection with the multiplication control mechanism are operable to raise trigger 23 to initiate operation of the stopping means, thereby terminating each of the successive registering operations of a program of multiplication.

When pawl 27 is released by trigger 28, its rearward free end will be moved downwardly and when the parts move through full cycle position, upon completion of the current operating cycle, released pawl 21 will drop in front of a shoulder 29 (Fig. 2a) of rock arm 22, thus connecting the drive to arm 24. Therefore, arm 24 will be rocked forwardly with arm 22 and into engagement with a fixed stop 39 to prevent further rotation of the parts.

In the movement of arm 24 against stop 39, one or the other of two opposed cam faces of an extension Sl of the arm will engage a pin 32 of a plate 34 which is pivotally mounted on the machine frame and has link connection 35 with clutch lever ii to provide for movement of either of the connected members in accordance with the other. Clutch lever ll wil therefore be moved to neutral position with plate 3 upon engagement of pin 32 by the active cam face of extension St. The parts will then rebound in the reverse direction to full cycle position where they will be arrested by a locator cam (not shown). The locator cam may be of any well known construction, such as disclosed in the aforenoted Patent No. 1,566,560, and may be fixed on any one of the shafts of the machine which have direct driving connection with the actuating mechanism. Furthermore, upon rebound of the parts from stop 38, pawl 2'! will be reengaged by trigger 28 which will have been only momentarily raised in the stop initiating operation. Therefore, pawl 2? will be moved to its normal position out of engagement with shoulder 29.

CARRIAGE SHIFTING MECHANISD/I The carriage shifting mechanism is constructed and operates substantially in accordance with the disclosure of U. S. Patent No. 1,964,478, issued to Austin A. Overbury on January 26, 1934, to which reference is made for the structural details of the mechanism and its operation.

A pair of reversely threaded worms each provided with a clutch are supported on a shaft 35 (Figs. 2, 3, and 10) which is rotatably mounted in the side frames to the rear of carriage 2. The clutches of like construction are selectively engageable to connect the related worm to shaft 36 which is driven by gear train 37 (Fig. 2) from an upstanding forked arm 45 of bail 45. 46 extends toward the rear of the machine where motor Ill, thereby shifting carriage 2 to the right or "left respectively. "'Right and-left shift'keys 38 'and 39 (Fig. 1). are operable to control the engagement of the respective shift clutches. These controls, however, are not shownas they bear no relation to the presentinvention. Furthermore, only the left shift worm 40 (Figs. 3 and 10) and its clutch are shown as the devices of the invention provided forleftward shift of the carriage in the performance of a program of mutiplication. It will, however, be understood that the devices of the invention are equally applicable tocontrol the shift in either direction.

The shift clutches are of well known construction wherein a spring urged pawl mounted on the driven member engages the driving member to connect the drive. A control detent-42 for the left shift clutch (Fig. 10) is normally spring urged into engagement with the pawl to disengage the clutch, and moved from engagement to permitthe pawl to engage the clutch in a manner to be described in connection with the devices of the invention. Shift worm 40, upon rotation, will engage a notched rail-43 (Figs. 3 and 10) which is fixed to the rear of carriage 2, thereby shifting said carriage one decade toward the left upon each cycle of rotation. Upon release, control detent 42 will be spring urged into engagement with the periphery of clutch 4i and when the clutch completes its cycle of operation the detent will engage the clutch pawl to disconnect the drive, thereby terminating the shift.

Means are provided to positively locate carriage 2 in its shifted position. Such means comprises a linkage 44 (Fig. 10) extending from clutch detent 42 to a bail 45 which extends across the front of the machine. A locating rod 45 (Figs. 2 and 10) is engaged at its forward end by Rod its tapered free end normally engages one of the series of notches (not shown) in a rail 4? (Fig. 2) fixed across the front of carriage 2. Upon movement of detent 42 to permit engagement of shift clutch 4|, bail 45 will be rocked by linkage 44 and move rod 46 from engagement with the related notch in rail 41, thereby releasing the carriage for the shifting operation. Upon movement of detent 42 to terminate the shift,

the tapered end of rod 46 will be moved into en- H gagement with a notch in rail 41, thereby definitely locating the carriage in its shifted position.

AUTOMATIC MULTIPLICATION Multiplier storage magazine The product is registered in product-dividend wheels I (Figs. 1 and 2) by repeated addition of the multiplicand which is set in the differential board. Alternately, however, the machine may be adjusted for subtractive registration whereby negative multiplication will be performed.

A multiplier storage magazine generally designated by the reference numeral 48 (Figs. 3, 4, and 7) and devices operating in conjunction therewith control the program of multiplication, including the initiation of theoperation, the registering and carriage shifting operations, and the terminating operation upon completion of the last registering and carriage shifting operations.

The multiplier storage magazine 48 is substantially spool shaped and is axially fixed on a shaft 49. Shaft 49 extends transversely of the machine "below selector bails and is journaled adjacent its ends forrotation inthe machine framing. 1

actuators 3 by depression of keys 6 of the key- 9a) to a home position (Fig. 9).

shown,-the capacity of the machine'allow's for the storage of twelve-multiplier digits including.

zeros. The storage elements comprise twelve slides 55 each-of which are difierentially settable to digit representing positions or alternatively to a zero position. The storage slides 50 are mounted in equidistantly spaced and radially extending slots which are axially aligned about the peripheries of magazine 48. The slides extend longitudinally from either end of the magazine and are radially contained by restraining rings 52 which encircle the slides at each end of the magazine.

When in their normal positions (Figs. 4 and '7) the storage slides-50 represent the digit value of one. Therefore, in a setting operation (to be described) if the digit value is one, no adjustment of the related slide 5!] will be effected. If, however, the value entered is a digit of two to nine, the related slide 59 will be adjusted accordingly one to eight steps respectively toward the right from its normal position. If the multiplier digit value is a zero, the setting operation will be effective to move the related slide 50 a fixed distance toward the left from the normal position shown in Figs. 4 and '7. Spring urged balls 53 which are recessed in magazine 48 engage notches on the inward edges of slides 50 to maintain them in adjusted position.

After each setting operation, the magazine will be indexed (in a manner to be described) one step in counterclockwise direction (Figs. 3 and 4) thereby moving another slide into setting position. A counting pawl-54 (Figs. 4, 7, 9, and 9a) is rotatably mounted on shaft 49 with its active end in a plane a slight distance to the right (Fig.

7) of unset slides 55: and is normally spring urged clockwise (Fig. 4) counterclockwise (Figs. 9' and When in home position, pawl 54 is located clockwise (Fig. 9) out longitudinal alignment with the slide 50 which is in setting position so that the slide may be set toward the right (Fig. 7) without interference from the pawl. During the initial indexing step of magazine 48 in a program of multiplication, the slide 50 which is in setting position will be moved therefrom and into operating relation (Fig. 9a) with pawl 54 which will then be moved with the slide as the magazine completes the indexing movement. As will be described, upon movement of pawl 54 from home position, the program of multiplication will be initiated and the subsequent setting and magazine indexing operations may be effected concurrently with the calculation. Counting pawl 54 is moved with magazine 48 upon subsequent indexing operations and concurrently operates to move the related slide 58 if set to a digit representing position step by step back to normal position and one step beyond to the left (Fig. 7), wh ch movement of the slide terminates the registering operation and initiates a shift of the carriage one decade toward the left to resume the calculation. Escapement means operated in conjunction with the carriage shift releases counting pawl 54 which is spring-moved in the reverse direction one step of movement and thus into operating relation with the next set slide 5%. Upon movement of pawl 54 into a position in which a slide 50 has been set to zero representing position, a contact member which is rotated in fixed relation with pawl 54 will, in lieu of a registering operation, initiate a one decade carriage shift which will operate to release the counting pawl and the relatedfcontact mem- 7 her for reverse movement into operating relation with the next set slide. The calculation will continue concurrently with the multiplier setting and magazine indexing operations until pawl E i and the related contact member have been moved to the home position at which time the calculation will have been effected more rapidly than the setting and indexing operations or else the product registration is completed. In either instance, the multiplying operation will be concluded but, however, will be resumed upon further multiplier setting and indexing operation. Should a slide be set to zero position while pawl 25 i and the related contact member are in home position, the contact member will immediately perform the carriage shift initiating operation; however, the operation of the carriage shifting mechanism will be held in abeyance until the magazine indexing operation is eifected. The foregoing briefly summarized operations in connection with the storage magazine and other subsidiary operations are described in detail in the following.

AUTOMATIC MULTIPLICATION (Control of the multiplier setting and magazine indexing clutch) A row of multiplier keys including a zero value key 56 and digit value keys one to nine (Figs. 1, 4, and 6) are arranged in sequence from left to right across the machine in front of the keyboard. Depression of any one of the multiplier keys will engage a clutch 58 (Fig. 2) for a single cycle of operation. Clutch 55, upon each cycle of operation, will store the value of the depressed multiplier key in magazine 18 and index the magazine for another setting and indexing operation. In the embodiment of the invention as shown, carriage 2 is shifted toward the left in the performance of the program of multiplication. The multiplier keys 5%, El, indicating respectively the zero multiplier values and the values of the multiplier digits to be entered in the magazine are, therefore, depressed in sequence from the highest to the lowest order values.

Clutch 5-8 (Fig. 2) is of well-known construction in which a spring urged pawl mounted on the driven member of the clutch is engaged by a detent 9 to disengage the clutch. The clutch is engaged by movement of the detent 59 to release the pawl which will then engage the driving member of the clutch, thereby connecting it with the driven member. Detent 5B rocked clockwise (Fig. 2) to engage clutch 58 upon depression of the zero value key 56 or any one of the digit value keys 5! and, upon release of the depressed key, the detent will be urged against the periphery of the clutch to engage the clutch pawl upon completion of the cycle to disengage the clutch. Clutch 53 must be limited to one cycle of operation upon depression of each of the multiplier keys. The action, however, of clutch 58 is so rapid that the operator is usually unable to release the multiplier key before the clutch has completed its cycle. Therefore, an auxiliary detent 59 is spring urged into engagement with the periphery of clutch 53 upon movement of detent 53 to engage the clutch. The control of the operation of detents 59, 59 by multiplier keys 55, 5?, is as follows:

The zero value key 56 and the one to nine value multiplier keys El have horizontally disposed stems (Figs. 3, l, and 6) which are mounted at their rearward ends on a shaft 56 extending across the machine and rotatably mounted in the side frames. The stems of keys 5? are freely mounted on shaft 50 and intermediate their ends the key stems have depending link connections 61 with the forward ends of digit selection levers 62. The stem of zero key 56 is fast on shaft 60 and a forwardly extending arm 63, also fast on the shaft, has depending link connection with the forward end of a zero selection lever 64 (Figs. 4 and 6). Selection levers B2, 64 are mounted on shaft 65 which is journaled in the machine framing, and are arranged with relation to a selection comb 6G (to be described) in a manner to control the multiplier value entered in magazine :28 upon operation of clutch 58. Selection levers E2, 64 are not arranged in progressive sequence from left to right as are the multiplier keys. As shown, this is necessary to properly relate the selection levers to the comb G6 and appropriate cross-over connections are provided to connect zero key 56 and digit value keys 5? by the depending links t! to the related selection levers 64 and $2 respectively. It will be understood, however, that considerable latitude may be used in the design and arrangement of the parts without departing from the general operating principles. Upon depression of the zero key it or any one of the digit value keys El, the connected selection lever E l or one of the levers 62 respectively will be rocked in clockwise direction (Figs. 3 and 4), thereby raising the rear free end of the lever which movement operates to engage clutch 58 in the following manner.

The free rear ends of selection levers 82, 64 underlie the lower edge of a bail 6'! (Figs. 3, 4, and 6) which extends transversely of the machine. Rearwardly extending arms of bail 6'! are fixed on a shaft (58 which is rotatably mounted in the machine framing and extends outwardly from the left side frame (Fig. 2). Therefore, when a selection lever E2, 64 is rocked upon depression of a multiplier key, the free rear end of the lever will engage ball 61 and rock said bail and shaft 68 to which it is fixed in counterclockwise direction against the tension of a spring 67 (Fig. 4) attached to the right end of the bail. Outwardly of the left side frame, a crank 69 (Fig. 2) with diametrically disposed arms is fixed at the end of shaft 58. The upper arm of crank 65 has link connection 79 with detent 59 of clutch 58 and the lower arm of the crank has yieldable link connection ii with the auxiliary detent 59. Crank 89, which will be rocked with shaft 88, will therefore move link 19 toward the rear of the machine and rock detent 59 clockwise to engage clutch 53. At the same time, crank 69 will move link ll toward the front of the machine, thereby rocking detent 59 counterclockwise into engagement with the periphery of clutch 58 and tensioning a spring H which comprises the yieldable connection of the link with the detent. Therefore, if a multiplier key is held manually depressed, thus holding crank 69 in operated position until clutch 53 approaches full cycle position, detent 59' will be moved inwardly to a cut-away portion of the clutch housing and thereby engage the clutch pawl to disengage the clutch. Upon release of the depressed multiplier key, the connected one of the digit value selection levers 62 or the zero selection lever 54 will be moved to normal by a return spring 62a (Figs. 3 and 4) with which each lever is provided and the key will therefore be raised to normal by the connecting linkage. Bail 2'57 will now be allowed movement to normal by spring 6'! (Fig. 4) and thus crank 69 will be rocked clockwise to the normal position shown; in Fig. 2. Accordingly, link 10willmovedetent59 to clutch disengaging position and link'll willmove detent 59 toclutch engaging position. Clutch 58, however, will remain disengaged as a slight step of movement of Y the clutch will bring its pawlrintocontact with detent 59.

Upon depression of the zero key. 56v or one of the digit value-keys-El, provision must be. made to prevent the depressionof another of the multiplier keys until clutch B-has completeditscycle of operation. This is necessary'as the storage or" only one multiplier digit in magazine 48211136 be effected'upon each cycleof operation ofthe clutch and, furthermore, the operation of theselection mechanism would be disorganized. Therefore,

latching meansprevents the retraction of a depressed multiplier key, if manually released,.until clutch 58 completes its cycle of operation; and the latcheddown key, inturn, operates a-series of latch'plates 72 (Fig. 4) to preventthedepressionyof any other of themultiplier key-s.

Latching plates 12 are pivotally. mounted at their lower ends and the upper horizontal edges of the plates are disposed just below the stems ofmultiplier keys 56, 51-. The upper edges of plates 12* extend-adjacent one another leaving a in the machineframing and at its right'endthe 1 bail has pin and slot connection with'a'link 14 which is attached at its'rear end to bail 61. Bail ?3 extends, above and across the digit value selection levers 62,: lie-inwardly of their free-ends and is adapted to engage thelatching shoulders 15 with whicheach ofrthe selection levers-is provided: When ball 61. is'rocked by a selection lever 62' or 541 the; piny'and' slot connection in link 74 will permittheshoulder15of the lever to beraisedrabove therear edge o'fbailil3. However, as-bail SF!" completes its movement; link will be effective to rockbail l3 in counterclockwisedirection (Figs. 3 and-"4) thereby moving the rear edge of the bail-.beneath shoulder 15, thusholding. the selection lever; rockedrand the multiplier key depressed. The action of detent 59 (Fig. 2.) will preventibail fi'l'ffrom'movement'to normal until clutch 581(Fig. 2) has completed its cycle; Detent 59, .upon release of the depressed multiplier key, will be moved only a slight distance and then willlberestrained by engagement with the periphery of clutch 53 until the clutch approaches full-cycle position. Therefore, crank '69 and bail 61 will be held in rocked-position and the depressed multiplier key latched against retraction by bail l3 until detent 59 moves inwardly to disengage clutch 58 atthe end of its=cyc1e.

AUTOLIATIC. MULTIPLICATION (.Setting'wa'md indemi'mg operations) f Means reciprocally driven I by clutch 58: controls the operationotsettingrmeans to enter a value .in magazine 48+ in. accordance with .a depressed.,:mu1tiplier. key; and to then index; the

10 magazine into. position for another setting and indexing operation.

It will be recalled that no adjustment of a difierentiallysettableslide 58 (Figs. 4,6, and 7) is required for storage. of the digit value one in magazine 48.: Therefore, a lever leis rocked clockwise (Figs, 4. and6) to adjust a slide 50 which is in setting position one toeight steps of movement toward the rightrepresentative of the digit. values two to nine respectively. Converse- 1y, lever 16. is rocked counterclockwise to adjust the'slide 513a predetermined distance toward the left for the storage of a zero multiplier. Lever I6 is pivotally connected at. its forward end to combwfilisand intermediate its'ends it is freely supported by a fixed plate TI. Hi-maybe swungabout its pivotal connection with comb. 66. Comb 66 has pivotal mounting at its respective ends on the forward ends of a pair of armstiwhich-have pivotal mounting at their rearward'ends. on plate H. An arm I40 having: common pivotal mounting with the left arm 85is spring biased to normal clockwise position (Figs. land 6) wherein saidarm I40 isengaged by a cam end li laofzero selectionlever 64. Theright freeend'of arm' It!) comprisesa pair of steppedtreads the rightmost of which engages astud 76a on lever 16: intermediate its ends-when said'ar-m Mills in normal clockwise position. A pairof opposedcam arms 18 and" 19 engage a roller 16b (Figs. 3 and 4:) on the under face of lever 16 intermediate stud'16a and the levers forked rearend. A- spring MZ' attached at thepoint of connection of comb 66 with right arm 85 biases comb 6 toward the left of the machine to thereby impart clockwise movement to lever l'Ei-with-stud TSa-asapivot. Comb Eli and lever 76, however, are-normallyrestrained from such movement'by cam'18 engaging rollerlfib on the lever; Conversely, aspring I43 attached to stud 'IBa biases lever 16 in counterclockwise direction about its pivotal point of connection with comb 56. Arm Mil, however, engagingstud 16a andcam' 19' engagingroller 16b normally restrains lever- 16- from such movement.

Cam arms 78 and 19'are-fixed on a shaft 86 which is dournaled inthe machineframing and extends outwardly (Fig. 2) from the left side frame. An upstanding crank 8| is fixed'a't the left end of shaft 8'0 and has link connection 82 with thedrivenhousing of clutch 58. Therefore, upon each cycle of operation of clutch 5'8, crank 8|, shaft ilfi, and ca'm. arm 18, l9'wil1be rocked in clockwise direction (Figs. 3 and 4) and return. The setting operation will be performed upon said clockwisemovement of cam arms 18,

l9 whereupon setting lever lfi'will be released for clock-wise or alternatively"counterclockwise movementand upon the return movement of shaft and cam: arms 18, 79 the magazine indexing operation will he performed'and lever 16 will be restored to normal.'

As bestseen in-Fi'gs. 4' and 6, the forkedrear end of-lever'lfi 'engages 'a lug 50 of the differentially settable slide-Eflwhich is in setting position: Magazine 68is definitely located in its indexedpositions bya holding pawl 83 (Fig. 4) engaging-"artooth' on a ratchet 84"which is fixed on: supporting-shaft won which the magazine is fixed}. Asihereinafter described, magazine 48 is indexedicounterclockwise (Figs. 3 and 4) and is never restored but remains in the last position to whichiitfisa.indexed The setting and indexing operations-will first berdescribed in connection. withltheqo-peration of setting lever: 76 .upon

Therefore, lever repression of multiplier keys which represent the digit values one to nine.

Upon depression of a multiplier key 5?, an upstanding lug 62 (Figs. 3 and 4) of the rocked selection lever 62 will be raised into operating re lation with one of the teeth 66 of selection comb 85. Upon the attendant operation of clutch 58 and the consequent rocking of cam arm 18, setting lever 76 will be released for clockwise move- I ment (Figs. i and 6) about stud lfia as a pivot. Spring Hi2, therefore, will move comb ES to the left a distance wherein the comb is blocked from further movement by engagement of the related tooth 38' thereof with the lug B2 of a selection lever E2 which is rocked upon depression of a digit multiplier key 5?; and setting lever '56 will be rocked clockwise to set the related slide 50 in accordance with the movement afforded comb B8. The arrangement is such that if the key 5'] representing the digit value of one is depressed, the lug 82 of the rocked lever 52 will be raised into a position a very slight distance to the left and into the path of movement of one of the teeth 65 of comb 65. Therefore, when lever 75 is released by cam arm 18, no appreciable movement will be afforded said lever for the reason that comb 66 will be restrained from movement toward the left by engagement of the tooth 65 with lug 62 and the related storage slide 50 will remain in normal position which is representative of the digit value one.

If, however, one of the keys 5? representative of one of the digits two to nine is depressed, the lug B2 of the rocked lever 52 will be moved into position to the left of a tooth 56' of comb 66 a distance which will permit the forked end of released lever ES to move the engaged slide 50 one to eight steps of movement to the right representative of the digits two to nine respectively. It

will be noted that the lever 62 which is rocked by the nine multiplier key 57 is without a restraining lug 62', and in setting of the digit nine, the slide 50 will be adjusted the maximum distance of eight steps which adjustment is controlled by a pin 58a (Fig. '7) on the slide engaging the flanged right end of magazine 33.

An indexing pawl 86 (Fig. 4) is mounted on an arm 8'! which is pivotally mounted on shaft 49 to the right of ratchet wheel 8 Pawl 85 en gages a tooth of ratchet 3c and arm 87 has link connection 88 with an upstanding crank 89 which is fixed on rock shaft When shaft 86 is rocked clockwise by the setting operation of clutch 58, pawl 8-5 will be rocked in the same direction by the connecting linkage and thus moved one tooth space on stationary ratchet Therefore, when shaft 32 is rocked counterclockwise to normal by clutch 58, pawl 86 will be effective to index ratchet shaft 49, and magazine 48 one step of movement in a counterclockwise direction (Figs. 3 and 4).

During the first part of the indexing step of magazine 68, the lug 5% of the set slide 5!! will be moved from engagement with the fork end of setting lever '56. Cam arm 18 in its return movement will then engage roller 16b of lever '53 and move said lever to normal position (Figs. 4 and 6) just prior to the completion of the indexing of magazine 38. As magazine 48 completes its movement, the lug 50' of the next slide 55 in the series will be moved within the forked end of setting lever 75.

AUTOMATIC MULTIPLICATION (Initiation of the program) As an incident to the first index g step 0f magazine 58, the set digit slide 59 will be moved from the position shown in Fig. 9 into operating relation with the counting pawl 54 as shown in Fig. 9a, and certain adjustments of the machine will be effected and the multiplying program will be initiated as follows:

Pawl 54 is mounted in a longitudinal slot in a sleeve 90 (Figs. 4 and '7) which is rotatably and slidably mounted on shaft :39 to the right of magazine 48. A gear 91 is integral with sleeve 90 and meshes with a gear 92 which is fixed on a shaft 93 journaled in the machine framing in parallel relation with magazine Q8. To the left of magazine 48 and also rotatably and slidably mounted on shaft 48 is a second sleeve Ei l having a gear 555 integral therewith. Gear meshes with a gear 96 which is fixed on shaft 93. The gears 92, 96 are of such a width that the gears BI, 95 respectively are allowed considerable longitudinal movement on shaft 49 and still maintain mesh with the respective gears. A torsion spring 9'! (Figs. 3, e, 7) has one end attached to shaft 93 and the other end to the machine framing. Torsion spring 9] urges shaft 93 and gears 92, 9B fixed thereon in counterclockwise direction (Fig. 4). Gears 92, 96 therefore urge gears 9!, 95 and counting pawl 54, which are in fixed rotational relationship, in a clockwise direction on shaft 49.

When the machine is in a normal position of rest, gears 9|, 95, and pawl 5 are urged to a home position by spring 9'! and are so located and restrained from further clockwise movement by a pin 88 (Figs. 5 and 8) on the outer face of gear 95 engaging the forked end of an arm 99 of a bail I08. When in this position, counting pawl 54 is located in a longitudinal plane intermediate that of the slide 50 which is in setting position and the next slide clockwise therefrom as shown in Fig. 9. When slides 59 are in unset position, the active end of the pawl is located in a vertical plane a slight distance to the right ends (Fig. '7). Pawl 54, therefore, will be out of the longitudinal path of movement of the slide 5D which is in setting position and will not interfere with the setting movement of the slide.

Magazine 48 will be independently moved in the initial indexing operation a distance equal to the clockwise displacement (Fig. 9) of the pawl 54 thereby bringing the set slide 5i: into longitudinal alignment with said pawl which at this time is in home position. However, during the completion of the initial indexing operation the pawl and magazine will be moved together, thus maintaining the set slide 5% and said pawl in operating relationship as shown in Fig. 911. When pawl 54 is moved from home position, the parts entrained therewith will be moved accordingly and this movement effects the aforenoted adjustments of the machine and initiates the multiplying operation. The devices effecting the above operations are constructed and operate as follows:

An escapement wheel [0! (Figs. 4, 5, '7, 8, and 8a) is fixed on shaft 49 to the right of gear 95. Fixed on the inner face of gear 95 adjacent wheel I9! is an escapement pallet E92 which is therefore in fixed rotary relation with counting pawl 54. Pallet !02 comprises arms 162a and i022). When the parts are in normal home position, arm 32a is in the path of movement of one of the teeth of escapement wheel Iii! and is angularly displaced from said tooth equally to the angular displacement of counting pawl 54 from the slide 59 which is in setting position; and arm l02b is positioned to the right and (Figs..2a.and'5) on clutch lever II.

out of thepath of movement of the, teethof the escapement wheel. Therefore, when magae zine has been moved, in the initial indexing operation, the distance sufficient to bring the set slide 50' into alignment with counting pawl 54, a .tooth of'wheel IUI willengagearm I020, of pallet I02; thereby moving entrained gears 96, 92, BI, and. counting pawl fi i'with magazine 48*during the remainder of the initial indexing movement. Upon subsequent indexing movements, wheel I9I, through pallet arm I02a, will be-effective to move counting pawl 54 a full step of movement with magazine 48 unless said pawl has been returned reversely to home position, as later described, in which instance the above described operations will be repeated upon depression of a multiplier key. 7 e

' Upon ..movement of, gear 95 and the consequent movement of pin 953 from engagement with the forked endof .arm 99 of bail I90, said bail will be operated to move clutch lever II (Figs. 2 and'Za) and initiate a registering operation of the multiplying. program. B'ail I99 extends to the outside of the left side frame and is thereat provided with an upstanding arm Ittia having a forked freeend which embraces a pin Hit The prongs of theforked arm IIlOa are so spaced that normally clutch lever II may bemoved in other registering operations to its. active positions without interference. Attached to and extending outwardly from arm I094: is a second upstanding.v arm I991). Arm. I001) has toggle spring connection I031(Fig, 2) with a two position lever I94. When lever I 9411s in the counterclockwise :i

position shown in Fig.2, toggle spring I93 biases bail I90 in counterclockwise direction. Normally end of shiftlink III (Fig.2) will'be lowered, thus moving a shoulder at the. under forward end of the link into position in front of a pin I I2 on stop arm 24., Thisadjustment constitutes the conditioning of the shift control mechanism. AUTOMATIC MULTIPLICATION (Registering and carriage shifting operatz'ons) dividual registering operations willjbe followed bail I00 is held in central inactive position by 1 pin 98 engagingthe fork 99 of the bail. However, when pin 98 is removed from fork 99 during the initial indexing operation, toggle spring I63 will beeffective to rock bail in counterclockwise direction (Figs. 2 and 5) and fork arm Iiifla will engagepin I Ia, thereby rocking clutch lever II clockwise and effecting additive operation of the registering mechanism. If lever I64 is set clockwise from the position shown in Fig. 2, toggle spring I93 will bias bail I99 in the reverse direction, thereby providing for negative registration upon release of the bail by pin 98.

Carriage shift control mechanism will be conditioned uponmovement of gear 95 from home position and the resulting initiation of the multiplying operation. At the left end, and integral with sleeve9 i and gear 95 is a flange 94' (Fig.

4) having a cam depression in its periphery. When the parts are in normal position (Fig; 4)

- aroller on one arm of ;a spring urged'bell crank slot and pin-connection with the forward end Therefore, upon move-.'

of shift control link I I I. ment-of hang-e94 with gear 951 from home position, crank I95 will-be rocked clockwise (Fig. 4) byaction of the cam depression in the flange and tblfioue'h the poi-inectin ilinkager thesforward by a carriage shiftrof one decade toward the left until the last registering operation, which, is followed by a carriage shift, is effected, As heretofore noted, after the multiplying program is initiated, thesuccessive multiplier digit setting and magazine indexing operations will be efiected concurrently with the calculation unless the machine runs ahead of the operator, in which case the machine will come to rest andthen be restarted. upon. depression of another multiplier key.

. The differentially settable slides 56 (Fig. 7) each have on their inner edges eight tooth spaces representative of. the digits two to nine and equidistantly spaced from .the right. ends of the slides. As heretofore noted, if a.digit value of one is stored in magazine. 43, no adjustment is made of the controlling slide 58." Therefore, when the slide is moved into alignment with counting pawl 54%, the left active endof the pawl will be positioned a slight distance from the right end of the slide, as shown in Fig. '7. If the stored digit is two, pawl 54 willengage. the first tooth space from the end of slidefifi, etc. Upon each registering cycle of the machine, pawl 54 will be longitudinally reciprocated toward the left from the position shown in Fig. '7 av distance of one tooth space of slides 59' and return. Therefore, a set slide 59 engaged by pawl 55 willbe moved one step to the left toward its normal position upon each registering cycle of the machine and whenrestored to its normal positiornpawl 54 upon the following registeringcycle will engage the end of the slide and move said slide to the left one step beyond its n-ormalposition. The movementofaslide 56 the step beyond its normal position is adapted to terminate the registration at the .end of the current registering cycle. Therefore, if the digit multiplier is one, pawl 54will engage the end of the aligned slide fifiduring the first'registering cycle, therebyterminating the registration, and if the pawl engages the first tooth space of the slide, it will engage the end of the slide duringthe second registering cycle, etc. The devices for driving the pawl 54 and for terminating the registrations are as follows:

Sleeve .99 (Figs. 4 and?) on which pawl 54 and gear ill are mounted has-an annular groove to the right of the gear; An arm IE3 (Figs. l, 7) is pivotally mounted forreciprocation in a horizontal plane and the. rear end of the arm-engages the annular groove ofsleeve 9E3." Shaft 23, to which rock arm 2,2.is fixed (Fig. 20;), extends across-the machine above arm H3 and a depending arm I I i*'(Fig.' i) fixed on shaft Z-Bcarries a drivepin which engages a cam slot Him in arm II?.-.: As arm 22 is rocked-upon each registeringcycle-of the'machine, shaft 23'will rock armcI I Land the pin thereon willreciproeatei-the rear end; of arm: II3 toothe left. and-return.

Sleeve 95 will therefore be reciprocated by arm H3 and pawl 54 mounted on the sleeve will feed the aligned slide step by step toward the left and one step beyond to stop the registration. It will be noted that gear 9| mounted on sleeve 90 will be moved longitudinally with the sleeve, but will remain in mesh with gear 92. Therefore, subsequent multiplier setting and magazine indexing operations may be efiected concurrently with the registration as pawl 54 may be rotated with magazine 48 at the same time it is longitudinally reciprocated. When the slide 53 ali ned with pawl 54 is stepped back one step past its normal position, the registration will be terminated as follows:

A collar H5 (Figs. 4, 5, and 7) is mounted for rotational and axial movement on shaft to the left of the ends of slide 56. The collar 553 has slot and pin driving connection Kit with pallet [Q2 which, as heretofore described, is on gear 95. Collar lit, therefore, has xed rotary relation with counting pawl Ed through gears 95, 96, 82, and Si. A cam lug til? extends to the right of collar H6 and terminates a slight distance to the left of the plane of the left ends of slides 53 when said slides are in normal unset positions. Cam lug H6 extends circumferentially in a position where it will be engaged by a slide 50, if said slide is aligned with and moved to the left of its normal position by pawl 5 1', and in which position the next slide 5 clockwise therefrom (Fig. 4), if moved toward the left in a zero setting operation (to be described), will miss said lug.

A plate I i5 (Figs. 4 and 7) is mount in a circumferential slot on collar H6 and is therefore adapted for longitudinal movement with te collar on shaft 49. However, plate ii? is restrained from rotational movement by an integral arm extending therefrom and fixed at its end on a shaft Ill. Shaft lil extends across the machine and is slidably mounted in the ma chine framing (not shown). A compression spring H8 on shaft H'l engages a collar on the shaft and the machine framing thereby urging shaft ill, plate H5, and collar lid to their normal position toward the right, which position is determined by a fixed stop (not shown).

A unidirectional trip pawl EM is mounted on the left end of shaft ill. pawl Hill is positioned to the right adjacent the right arm of a lever H9 which is pivotally mounted inwardly of the left side frame. 'The lower end of a push rod i221 is pivotally attached at the end of the left arm of lever iii) and extends upwardly in suitable guides at the inner side of the left side frame. As shown in Fig. 2a, a lug on the under edge of trigger 28 extends inwardly through an opening in the left side frame and the upper free end of push rod E225 (shown in dotted lines) underlies the lug. Upon movement of a slide 5t: by counting pawl 54 one step to the left beyond its normal position, the left end of the slide will engage lug H8 thereby moving collar H6, plate H5, rod ill, and the cam end of trip pawl Hi l to engage and rock lever H9 clockwise (Fig. 4). Push rod H29 will therefore be raised by lever H9 and trigger 28 will be raised by the upper end of the push rod, thereby releasing pawl 2'! and terminating the registration as described in connection with the registering mechanism. In its return reciprocatory movement, counting pawl 53 will release the related slide 50 and spring H8 will restore shaft Ill, plate H5, collar H6, and slide 58 to its nor- The cam end of trip I mal position. Trigger 28 will therefore be released and upon rebound of stop arm M. from stop 30, pawl 2'! will be reengaged by the trigger. It will be noted that pawl Hi l in the aforedescribed tripping operation is moved only far enough for its cam end to engage and rock lever H9. However, in a tripping operation hereinafter described in connection with a Zero multiplier, pawl M4 is moved far enough to rock and then pass beyond lever H8.

The operation of the registration terminating means will initiate a one decade carriage shift, the carriage shifting operation will operate escapement E03, H32 (Figs. 4, 5, 8, and. 8a), to release counting pawl 54 for one step of reverse movement thereby adjusting said pawl into alignment with the next digit slide 58 and upon termination of the carriage shifting operation, clutch lever i i will be again moved to active position to start the registering operation in the next order as follows:

Upon movement of arm 25 (Figs. 2 and 2a) against stop 36, pin H2 on said arm will engage the shoulder at the end of shift link H i, thereby moving said link toward the front of the machine. Link Hi is attached at its rear end to crank 52f (Figs. 2 and 10) which is fast on a rotatably mounted shaft l22. A trigger i23 fixed on shaft 522 engages a lu of left shift clutch detent '32. Therefore, crank 25, shaft 22 and rigger 523 will be rocked by link iii, thus movdetent E2 and engaging shift clutch 41. ton 4i will be engaged for a single cycle of ration as arm 24. rebounding from stop 30 will link Hi, thus permitting the spring of detent 32 to urge it to clutch disengaging position.

Escapement Nil, I92 will be operated by a cam (Figs. 10) on shift shaft 36. Cam [2:3 is engaged by a roller at the rear end of a spring urged arm i225. Arm H5 is fixed at its forward end to a transverse shaft 26 which is journalled in the machine framing. A depending yoke I2"! is fixed on shaft I26 and, at its lower end, the yoke has a drive pin l2? engaging a cam slot in a horizontally disposed arm I28. Arm l28 is pivotally mounted at its rear and at its forward end (Figs. 4 and 7) engages a spool formed on sleeve 9 3. Therefore, when shift clutch i! is operated, cam i124 will depress arm 25 and then allow it to be spring restored to normal. Shaft E26 and yoke l2? will be rocked by arm 25 and arm 128 will move sleeve 55, gear 95, and escapement pallet il2 to the left and return.

In the leftward movement of the parts, pallet arm @6204 will be moved from engagement with the tooth of escapement whee ill! and pallet arm 16% will be moved into position midway be tween two of the teeth of the wheel. Therefore, gear 95, on which pallet ififi is fixed, will be reeased and driven in clockwise direction (Fig. 4); counterclockwise (Fig. 8a) by spring Bl through gear 96 on shaft 93. Gear 9! will be driven in ilke direction by gear S2 and also sleeve 9 and counting pawl 54. Thus, pallet arm 5821) will be moved into engagement with a tooth of escapement wheel Hll, thereby preventing further reverse movement of the parts until pallet E62 is moved back to the right with gear 95. The above described operation provides for approximately one half step of movement of the parts. Upon movement of pallet back to the right, arm 552?) will be moved from engagement with wheel Hi! and arm l02a will be moved into position to engage the next tooth of wheel I01. Therefore.

64:; at its rear which engages arm I40.

the parts will be released a second time and the full reverse step of movement will be afforded the parts, thereby moving counting pawl 54 and lug 6' into alignment with the next digit slide 50. It will be noted that the multiplier storing and magazine indexing operations may be effected concurrently with the reverse movement of counting pawl 54 and lug H6 as the relative reverse movement of the parts will notbe effected by the indexing movement to move the parts as a unit in the opposite direction.

Means must be provided to prevent itiation' of registration until the carriage shifting operation is completed. Such means comprises a lever I35 (Fig. 2) pivotally mounted on the left side frame. Lever I35 has an open end slot at the under side of its left rear end above a pin Nb of clutch lever II. The right arm of lever I35 has link connection I29 with the left arm of alever I30 (Fig. which has fixed pivotal mounting at the front of the machine. The

right free end of lever I has a lug engaged by the forward end of carriage locator rod 46. Upon initiation of the carriage shift, locator rod 46 will be moved toward the front of the machine, lever I30 will be rocked clockwise, 'andlink I29 will be moved toward the rear of the machine,

thereby rocking lever I counterclockwise (Fig;

2). At this time, clutch lever II will have been centralized against the bias of toggle spring I03 by the cam slot of extension 3| of stop arm 24. The slot at the .rear of lever I35 will therefore engage pin I lb of clutch II, thereby holding it in neutral position when it is released by extension 3| as arm 24 rebounds from stop 30. At the conclusion of the carriage shifting operation, carriage locator rod 46 will be moved toward the rear, thereby releasing lever I30 and link I29 will be spring moved toward the front of the machine, thus rocking lever I35 and releasing clutch lever II. Toggle springI03 will then be effective to rock clutch II to active position, thereby starting a registering operation which will be controlled by counting pawl 54 which, during the carriage shift, was moved reversely into alignment with the next digit slide 50. The alternate registering and carriage shifting operations will be effected until counting pawl 54 has been stepped reversely into alignment with the last digit slide which has been set. The carriage shift operation following the final registering operation will releasecounting pawl 54, which now, however, will be afforded only a half step of movement because pin 98 (Figs. 5 and 8) on gear 95 will engage :forked'arm 99, thereby preventing further reverse movement of the connected parts. Bail I00, therefore, will be constrained from rocking movement by pin 98, and thus, upon termination of the carriage shift, toggle spring I03 will be ineffective to move clutch lever I I from neutral position.

AUTOMATIC MULTIPLICATION (Zero multiplier key) Depression of zero multiplier key 56 provides for one decade of carriage shift without registration. Upon depression of zero key 56, zero-selection lever 64 (Figs. 4 and 6) will be rocked and the setting and indexing clutch 58 will be engaged as heretofore described. As hereinbefore noted, lever 64 is provided with a cam end As lever 64 is rocked, its cam end will rock arm I counterclockwise, thereby moving the rightmost tread the reinat the right end of the arm from engagement with stud 16a. of setting lever 16. At the same time, blocking portion 64' of lever 64 will be raised into position a very slight distance to the left one of the teeth 66' of selection comb 66, thus-blocks ing leftward movement of the comb. As cam arm 19 is rocked upon operation of clutch 58, setting lever i6 will be released and spring I43 will be effective to rock said lever counterclockwise about its pivotal connection on comb 66. Lever I6 will be limited in its movement by engagement of stud lBa with the left tread of arm I40 and the movement afforded will be effective to move the related storage slide 50 approximately two steps of movement to the left.

A fixed ring I36 (Figs. 3, 4, 5 and '7) encircles magazine 48 a slight distance to the left of lugs 60 of slides 50 when said slides are in normal unset position. As sho n in Figs. 4 and'5, ring I36 is cut away at a point aligned with the slide 50 which is in setting position. When a slideiil is moved to the left in a zero setting operation,

lug 50' of the slide will be passed through the opening in ring I 36, thus bringing said lug to the outer left side of the ring, the edge of the ring defining the top of the opening terminates immediately adjacent the set slide as best seen in Fig. 3. Therefore, in the subsequent indexing operation of magazine 48, the set slide 50 will be moved counterclockwise (Fig. 4) within the ring and the radially extending lug 5i to the left of the ring will prevent said slide from return movement toward the right.

A slide 50 set to zero representing position operates in connection with the aforenoted lug M6 on collar H6 to initiate operation of the carriage shifting -mechanism. As heretofore described, collar H6 and lug H6 are rotationally driven in fixed rotation with counting pawl 54. If there are no multiplier values stored in magazine 48, pawl 54 will be in home position and lug IIB' will be in position to be engaged by the slide in setting position if said slide is moved to zero representing position, thereby moving collar H6, plate II5, rod Ill, and trip pawl I44 to the left to rock lever I I9 and release detent 21. As heretofore described, the subsequent initial indexing operation of magazine 48 will result in the movement of clutch lever II to active position. However, no registration will be effected as released detent 21 will carry arm 24 against stop 36, thereby initiating a carriage shift and neutralizing clutch lever II.

If one or more multiplier values have been stored in magazine 48, counting pawl 54 will be aligned with the first of the set slides 50 and lug H6 will therefore be in position to be engaged by the slide as described. If now a slide 50 is set to zero position, it will not engage lug H6 and thus a multiplier value of zero will be stored in the magazine. The subsequent indexing operation will move zero set slide 50 into position to be restrained from right return movement by ring I30 as heretofore described. When pawl 54 is released for a reverse step of movement which will move it into alignment with a slide 50 which is set to zero position, a cam edge at the leading side of lug I I6 will be moved into engagement with the left end of the slide of movement of the lug. The unidirectional trip pawl I44 on shaft ill therefore is given sufficient movement to pass beyond lever I I9 thereby only momentarily rocking said lever. Such provision is necessary as trigger 28 (Figs. 2 and 2a) must be released to engage pawl 21 upon return of arm 24 from stop 39. If such engagement is not effected, engagement of clutch 9 for a registering operation would result in an erroneous carriage shift. Any slide 50 which is set to zero will be held in set position by ring I36 until, upon subsequent indexing operations, it is moved into setting position. Upon movement into setting position, lug 55 of a Zero set slide will be engaged by the right face of a cam segment I32 (Figs. 3, 4 and 5) which has fixed mounting with relation to ring I36 and thereupon the slide will be cammed to the right through the opening in ring I35 to its normal unset position.

Usually the program of multiplication will be effected so rapidly that the multiplier storage capacity of magazine 48 will not be reached. However, should this condition be reached, means are provided to prevent an indexing operation following the setting operation which exhausts the capacity.

I31 (Fig. 5) having an open end slot I 37 and spring urged in counterclockwise direction. If the capacity has been reached, counting pawl 54 and lug H6 will be in alignment with the slide 50 which will next be indexed into setting position. The pin 98 of gear 95 which has fixed rotational relation to pawl 54 and lug H6 will enter slot I31, thereby rocking crank I31 clockwise about a shaft I45 on which it is pivoted when the exhausted condition of the magazine :7

which exhausts the capacity of magazine 48, said clutch will be arrested in mid-cycle position and the indexing operation will be held in abeyance. When the slide 56 which is next to be moved to setting position is available, pin 98 will have been moved reversely with gear 95, pawl 54, and lug H6, thereby releasing crank I31 and restoring detent I34 to normal, thus reengaging clutch 58 which will in completing its cycle of operation eiiect the indexing operation.

Although a preferred form of the invention has been shown and described as embodied in a particular type of calculating machine, it will be understood that the devices of the invention may be employed to control the operation of other types of calculating machines. Also, it will be apparent that the devices of the invention may be subject to considerable alteration without departing from the improved operating principles set forth. The invention, therefore, is not to be considered restricted to the specific embodiment disclosed except as required by the spirit of the appended claims.

I claim:

1. In a motor driven calculating machine having a shiftabie carriage, a product register on said carriage, cyclic differential actuators for said register, and means for denominationally shifting said carriage; multiplication control means, comprising a series of differentially settable mul- Such means comprises a crank tiplier storage elements, selection means operable to set said elements each to digit representing positions or to a zero representing position, means for initiating operation of said actuators, control devices operable to terminate operation of said actuators, a member operable in response to operation of said control devices to initiate denominational operation of said carriage shifting means, a feed device for said elements, mounting means adapted for step-by-step adjustment to eiiect relative movement of said elements with said feed device and said control devices whereby said elements are successively each either located, if set to a digit representing position, for operation by said feed device or rendered effective, if set to said zero representing position, to cause operation of said control devices, means for driving said feed device in time with said actuators thereby feeding an operatively associated storage element toward a position to cause operation of said control devices, drive means operable in response to operation of said control devices to effect a step adjustment of said mounting means, and means operable upon termination of the operation of said shifting means to reinitiate operation of said actuators.

2. In a motor driven calculating machine having a shiftable carriage, a product register on said carriage, cyclic differential actuators for said register, and means for denominationally shifting said carriage; multiplication control means, comprising a series of differentially settable multiplier storage elements, selection means operable to set said elements each in a like direction to digit representing positions or in the opposite direction to a zero representing position, means for initiating operation of said actuators, control devices operable to terminate operation of said actuators, a member operable in response to operation of said control devices to initiate denominational operation of said carriage shifting means, a feed device for said elements, mounting means adapted for step-by-step adjustment to effect relative movement of said elements with said feed device and said control devices whereby said elements are successively each either located, if set to a digit representing position, for opera tion by said feed device or rendered effective, if set to said zero representing position, to cause operation of said control devices, means for driving said feed device in time with said actuators thereby feeding an operatively associated storage element toward a position to cause operation of said control devices, drive means operable in response to operation of said control devices to effect a step adjustment of said mounting means, and means operable upon termination of the operation of said shifting means to reinitiate operation of said actuators.

3. In a motor driven calculating machine having a shiftable carriage, a product register on said carriage, differential actuators for said register, cyclic drive means for said actuators, full cycle stopping means for said actuator drive means ineluding a member driven by said actuator drive means upon operation of said stopping means, and means for denominationally shifting said carriage; multiplication control means, comprising a series of differentially settable multiplier storage elements, selection means operable to set said elements each to digit representing positions or to a zero representing position, means for initiating operation of said actuator drive means, a Contact member e eable to cause operation of said stopping means, means operable by said driven in'ember'ofsaid stopping means-for"initia'ting denominational operation ofsaid carriage shifting means, a feed device for said elements,

mounting '-"meansadapted for step-by-step ad- 'justment toefiectrelativemovement of said ele- '*m'ents with said feed device and said" contact member whereby said elements are successively each either located, if set to a digitrepresenting position, for'operation'by said feed device or engaged, ifset to said zero representing position,

with said contactmember, means -for driving said feed device in time with-saidactuatorsthereby feeding an operatively associated storage element toward a position to engage said contact member,

drive means operable in response to operation ofsaid stopping means to effect a step adjustment of said mounting means, and means operable upon termination of the operation of saidshifting means to reinitiate operation of said actuator drive means.

' 4. In a motor driven calculating machine havelementsadapted for step-by stepadjustment to locate'said elements successively in setting position; indexing means'operable in response to op "eration :ofsaid selection means to effect a'step of adjustment of. saidmountin'g means, means for'initiating operation of said actuator drive means, .devices adjustable'with and relative to said mounting means including a contact membenengageable bysaid elements to cause operation of said stopping means and a feed device driven in time with said actuators tofeed a digit set" element toward said contact member,-a memberioperable in response to operation ofasaid stopping-means to initiate-denominationalcoperation of said carriage shiftin means, driverneans operable in response to operation stopping means to adjust said contact member and said feed device relative to said: mounting means succes- =sively .into engagem'eiitiWithizetd set elements or into operative association with digit set elements respectively, and means operable upon termination of said shifting means to reinitiate operation of said actuator drive means.v

5. The invention according to claim 4 wherein the means for initiating operation of said actuator drive means comprises means operable in response to depression of the digit multiplier keys.

6. The invention according to claim 4 wherein means are provided to prevent reinitiation of the actuator drive means upon termination of an operation of the carriage shifting means following an operation of the stopping means under control of the last of a series of set storage elements, and wherein the adjusting means for the contact member is operable to locate said member for engagement by a storage element upon movement of said element to zero representing position.

7. In a motor driven calculating machine hav ing a shiftable carriage, a product register on said carriage, differential actuators for said register,"cyclic drive: means for 'said ractuatorsyz full "cycle" "stopping means for: said i'a'ctuator. drive "means; and 1 means for: denominationally shifting said carriage; multiplication control means, com- 6 prising arotary' magazine,a 'series of diiferenti'ally 'settable multiplier storage slides'mounted 'in: said magazine, selection'means operableito set said sl ides each to digit representing-positions or r to a"zerorepres'enting' position including digit lo multiplierkeys'and a-zero multiplier key succes- 'sively depressible' to control -the. operations trespectively, indexingmeans operable in response to 'operation" of "said selectionmean's to effect stepwise rotation of said magazine to bringiuns'et 15 slides successivelyrinto setting position, means -operable in' responsetodepression of said digit multiplier keys toinitiate operation of said actu- "ato'rdrive means,-rdevices rotatable with-and relative to saidmagazine including. a contactmember engageable'bytsaid slides to cause operation of said stopping meansand a'feed devi'ce driven in time with said actuatorstorlfeed a digit'set slide "toward said contact member, a'member operable in responseto operation of said stopping. means to initiate denominational operation of saidr'carriage shifting means, 2 drive means operable in response to operation: of'said' stopping-means to adjust said contact member and saidfeeddevice reversely relative. to *said magazine successively intoaengagementtwith*zeroset slides or into oper- "ativeassociation with digitset slides respectively, "and means'operab'le upon termination of oper- -ation'of saidshifting means to reinitiate oper- "--ationiof said actuator drive means.

5 8. In a' motor driyen calculating machine havxing a shiftable carriage, a product register .on 1 "said carriage, differential actuators for -saidregister, 'cyclic' drive' means for said actuators; .full icycle'"stopping means for said actuator drive 40 imeans, ands means for denominationallyshifting said carriage;multiplication control means, com- :prising a: rotary'magazine, a series-of multiplier -a'storageslides' mounted in said'magazine each zdifierentially settable from a normal position 5.1in alike direction to digit representing-positions orsettable from said'normal 'position in :the op- "posite' direction to 'a *zero representing position, --;i digit multiplier keys'and a zero key, settingmeans perable upon depression of any one of said keys, :1tselection means 1 adjustable upon depression of saidi keys'to control said setting means'to 'set a i'slide'itottheposition representing the value of a depressedkey, indexing means operable inresponse to operation of said setting means to effect stepwise rotation of said magazine to bring unset slides successively into setting position, devices rotatable with and relative to said magazine including a contact member engageable by said slides to cause operation of said stopping means and a feed device driven in time with said actuators to feed a digit set slide toward said contact member, a member operable in response to operation of said stopping means to initiate denominational operation of said carriage shifting means,

5 drive means operable in response to operation of said stopping means to adjust said contact member and said feed device reversely relative to said magazine successively into engagement with zero set slides or into operative association with digit set slides respectively, and means operable upon termination of operation of said shifting means to reinitiate operation of said actuator drive means.

9. In a motor driven calculating machine having a shiftable carriage, a product register on said carriage, cyclic diiferential actuators for said register, and means for shifting said carriage; the combination with a rotary magazine, a series of multiplier storage slides mounted in said magazine each diiierentially settable from a normal position in a given direction to digit representing positions or settable from said normal position in the opposite direction to a zero representing position, and devices operable in conjunction with successive set slides to control operation of said actuators and said carriage shifting means; of digit multiplier keys and a zero key, a drive transmission operable upon depression of said digit keys to move an adjacently positioned slide in said given direction or upon depression of said zero key to move said adjacently positioned slide in said opposite direction, selection means adjustable upon depression of said keys to control the setting operation of said transmission, and indexing means for said magazine operable in response to depression of said keys to bring said slides successively into setting position.

said magazine each diiTerentially settable from a normal position in a given direction to digit representing positions or settable from said normal position in the opposite direction to a zero representing position, and devices operable in conjunction With successive set storage slides to control operation of said actuators and said carriage shifting means; of digit multiplier keys and a zero key, setting means operable upon depression of any one of said keys including a lever engageable with said slides and pivotal in one or the opposite direction, selection means adjustable upon depression of said digit keys to cause pivotal movement of said lever in said one direction to set one of said slides to the position representing the value of a depressed digit key or adjustable upon depression of said zero key to cause pivotal movement of said lever in said opposite direction to set said slide to said zero representing position, and indexing means for said magazine operable in response to depression of said keys to bring said slides successively into position for engagement by said lever.

12. The invention according to claim 11 Wherein said lever is pivotal about one point in said one direction and about another point in said opposite direction.

13. In a motor driven calculating machine having a shiftable carriage, a product register on said carriage, cyclic differential actuators for said register, and means for shifting said carriage; the combination with a rotary magazine, a series of multiplier storage slides mounted in said magazine each difierentially settable from a normal position in a given direction to digit representing positions or settable from said normal position in the opposite direction to a Zero representing position, and devices operable in conjunction with successive set storage slides to control operation of said actuators and said carriage shifting means; of digit multiplier keys and a zero key, a lever having one of its ends engageable With said slides and having a, movable point of pivot intermediate its ends and at its opposite end, spring means for biasing said lever in a given direction about its end pivot point, spring means for biasing said lever in the opposite direction about its intermediate pivot point, blocking means for restraining said lever from pivotal movement and adjustable upon depression of said digit keys to release said lever for pivotal movement in one of said directions and upon depression of said zero key for pivotal movement in the other of said directions, selection means adjustable upon depression of said keys to determine the excursions of said lever, and indexing means for said magazine operable in response to depression of said keys to bring said slides successively into position for engagement by said lever.

FREDERICK W. PFLEGER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,409,575 Rechnitzer Mar. 14, 1922 2,371,752 Friden Mar. 20, 1945 2,538,896 Britten, Jr. Jan. 23, 1951 FOREIGN PATENTS Number Country Date 156,715 Great Britain Jan. I, 1921 

